Granted Patent
Utility
US 6,236,771 · App. 09/251,662
Optical transmission apparatus
Inventors:
Masahiro Aoki, Kazuhisa Uomi, Satoshi Aoki
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Feb 17, 1999
Inventors
Masahiro Aoki
Kazuhisa Uomi
Satoshi Aoki
Assignee (at issue)
HITACHI, LTD.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.